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    <h2>MFC实现打开、保存文件对话框和浏览文件夹对话框</h2>

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<div class="wiki_content">
    <h4>一、打开文件夹：</h4>
    <p class="subject1">1、CFileDialog实现</p>
    <pre>
CFileDialog hFileDlg(TRUE,NULL,NULL,OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST|OFN_READONLY,
       TEXT("支持的图像文件 (*.jpg;*.gif;*.bmp;...)|*.jpg;*.gif;*.bmp|专用Tiff图像文件(*.tiff;*.tif)|*.tiff;*.tif|所有文件(*.*)|*.*||"),NULL);
hFileDlg.m_ofn.nFilterIndex=1;
hFileDlg.m_ofn.hwndOwner=m_hWnd;
hFileDlg.m_ofn.lStructSize=sizeof(OPENFILENAME);
hFileDlg.m_ofn.lpstrTitle=TEXT("打开图像文件...\0");
hFileDlg.m_ofn.nMaxFile=MAX_PATH;
if(hFileDlg.DoModal() == IDOK)
{
m_path = hFileDlg.GetPathName();
UpdateData(FALSE);
}
    </pre>
    <p class="subject1">2、API实现</p>
    <pre>
OPENFILENAMEA ofn;      
char szFile[260];     
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize       = sizeof(ofn);
ofn.hwndOwner         = NULL;
ofn.lpstrFile         = szFile;
ofn.lpstrFile[0]      = '\0';
ofn.nMaxFile          = sizeof(szFile);
ofn.lpstrFilter       = "音频文件\0*.wma\0";
ofn.nFilterIndex      = 1;
ofn.lpstrFileTitle    = NULL;
ofn.nMaxFileTitle     = 0;
ofn.lpstrInitialDir   = NULL;
ofn.Flags = 0;

if (GetOpenFileNameA(&ofn)==FALSE)
{
return S_FALSE;
}
CString c_save_path=ofn.lpstrFile;
    </pre>
    <h4>二、保存文件</h4>
    <p>同上，只不过将 <code>CFileDialog hFileDlg(true,NULL</code> 改为 <code>CFileDialog hFileDlg(false,NULL</code>，
或者将<code>GetOpenFileNameA</code>改为<code>GetSaveFileNameA</code>，即可。</p>

    <h4>三、浏览文件夹对话框</h4>
    <pre>
//回调函数
int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
if(uMsg==BFFM_SELCHANGED||uMsg==BFFM_INITIALIZED)
{
     if(uMsg==BFFM_INITIALIZED)
     {
       ::SendMessage(hwnd,BFFM_SETSELECTION,TRUE,LPARAM(lpData));
     }
}
return 0;
}

TCHAR chPath[255]; //用来存储路径的字符串
CString strPath     = "";
BROWSEINFO bInfo;
GetModuleFileName(NULL,chPath,MAX_PATH);
strPath             =chPath;
ZeroMemory(&bInfo, sizeof(bInfo));
bInfo.hwndOwner     = m_hWnd;
bInfo.lpszTitle     = _T("请选择路径: ");    
bInfo.ulFlags       = BIF_RETURNONLYFSDIRS|BIF_EDITBOX;
bInfo.lpfn          = BrowseCallbackProc;
bInfo.lParam        = (LPARAM)strPath.GetBuffer(strPath.GetLength());

LPITEMIDLIST lpDlist; //用来保存返回信息的IDList
lpDlist = SHBrowseForFolder(&bInfo) ; //显示选择对话框
if(lpDlist != NULL) //用户按了确定按钮
{
SHGetPathFromIDList(lpDlist, chPath);//把项目标识列表转化成字符串
strPath = chPath; //将TCHAR类型的字符串转换为CString类型的字符串
m_save_path=strPath;
UpdateData(FALSE);
}
    </pre>

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